Locking device.



C. EHRMAN.

LOCKING DEVICE.

APPLICATION FILED MAY 24. 1915.

Patented 0013.3

C. EHRMAN.

LOCKING DEVICE.

APPLICATION FILED MAY 24. 1915. 1,200,178. Patented Oct. 3,1916.

2 SHEETSSHEET 2.

5 M. a/l.s 4 5 1 w. vi Z T m; M n T//, 2 z 8 m 1 /K/ J a H a- Q 5 H m m@FFEQ CHARLES EHRMAN, or new YORK, N. Y.

'LooKrNe DEVICE.

7 Specification of Letters Patent.

Application filed May 24, 1915. Serial No. 29,954. I

To all whom it may concern Be it known that 1, CHARLES EHRMAN, a citizenof the United States, residing at New York, in the county of New Yorkand State of New York, have invented certain new and useful Improvementsin Looking Devices, of which the following is a specification.

This invention relates to improvements in looking devices, andmore'pa'rti'cularly aims to provide an embodiment designed foradvantageous utilization in" connection with, and more particularly foruse as a readily employable'attachment for, permutation locks which inthemselves are .considered to furnish adequate insurance against the useof an unauthorized key but do not furnish such insurance against thepossibility of successful picking in con nection with the locking'bolt.

The cardinal object of the invention is to provide an embodiment oftheabove char acteristics wherein the same'may, with convenience and ease,be attached to a swing door, and may with expedition and safety be usedfor locking, unlocking (from the outside with a key and from the insidewithout a key) and holding the locking members in inoperative position.i v

Other important features of the invention concern themselves withdetails of construc' tion at present believed to be of the utmostimportance from the standpoints of ease of assembly, small cost ofmanufacture, rug gedness of construction, and absolute certainty ofpredetermined operation and pro-' -to be taken as a part of thisspecification,

and wherein is shown an embodiment of the above type, Figure 1 is ahorizontal sectional view taken through a swing-door 7 (provided withthe usual type of cylinder) and a door jamb 8, the said embodiment beingin this view indicated in what may be termed top-edge-plan and beingpartially mounted upon said door and partially mounted upon said jamb;Fig. 2 is a front elevation of certain vof the parts shown in Fig. 1; F1g. 3 is a section taken through a part ofthe subject-matter of Fig. 1;Fig. 4 1s a front elevation of the parts shown in F ig, 8 (with the faceplate 14 and with the parts mounted upon spindle 21 removed); Fig. '5'is a vertical sectional view taken on the line 55 of Fig. 3; and, Fig.6 is a rear elevation of a portion of the face plate 14 and a rearelevation of the terminal disk 23 mounted upon the spindle 21 mentionedin the above brief description of Fig. 4. I r

' Similar reference characters refer to similar parts throughout theseveral views of the drawing. 7

Door 7 is assumed in connection with the present embodiment already tocarry or to Patented-0on3, rare.

be preliminarily equipped with a Yale cylin- V der as indicated at 9'inFig. 1, the Yale key 10being the prime mover for unlocking the.oppositely beveled latch-noses 11 and 12 (Fig. 5) terminally carried bythe pivoted jaws 11 and 12 (Fig.4). A propermoving part, as the usualfinal'tumble'r, segment or combination-disk, located within the barrel 9of said lock, has attached thereto or carries for turning therewith abar 13 having substantially the cross section defined bythe slot 13shown in Fig. 4. And with thevface plate 9 of the cylinder anchored uponthe outer face of door 7, with the lock-casing 14 anchored upon theinner'face'of said-door and with the bar 13 engaged with saidslot 13 asmost clearly indicated in Figs. 3 and 4,]it willbe seen that theinsertion of the proper key'10 and the proper operation thereofwillrotate, in a clockwise direction,

a barrel 15 (Figs. 3 and 4) which is journaled in the wall of thelock-casing 14, and which has'formed therein the slot 13 aforesaidcarried by said barrel 15, for turningwith the barrel :15 a rigidlysecured collar 16, formed with a wiper-tooth 16 Casing 14 isprovidedwith the'usual side walls, posts 11 and 12 upon which are fixedlypivotedthe jaws 11 and 12, and there is also a'cut away portion'1-4 intowhich project the latch-noses aforesaid and into which may be enteredthe cross-bar of a U-shaped keeper 17, whereby the cross bar orroof-wall 17 (Fig. 5) of said keeper will automatically abnormallyspread apart the latch-noses 11 and 12%, preliminary to their lockingengagement with said keeper when the door is closed. 7 The keeper justreferred to is of course anchored upon the door j amb 8 in the locationshown in Fig.1, with its cross-bar in a plane parallel to that of theclosed door, and the latch-noses, it will be observed, are oppositelybeveled onone side respectively, with the ramp of each lying in a planewhich is oblique to the plane of the cross-bar of the-keeper 17,

so that the keeper may readily spread them apart; thus the door may belocked with a slam, while on the other side the noses arc in a commonplane, parallel to that of the cross-bar of the keeper. The inclinedfaces or ramps of the latch-noses permit the automatic latching of thedoor when 7 slammed, while the opposite faces hold it latched untildeliberately released.

The normal position of jaws 11 and 12, whether the door be closed oropen, is illustrated in full lines in Fig; l, the leaf-springs 18serving to urge the jaws against the opposite ends of a transverse stop19. v V

Jaws 11 and 12 each as to form somewhat l resembles a bell-crank lever,the first of these jaws presenting a peculiarly conformed single shorterarm, that normally lies within a bifurcated shorter arm of the secondjaw. These shorter arms actually cooperate in a cam capacity, forwheneither of the jaws is rocked against the tendency of its leaf spring18, the other jaw is forced similarly to rock.

Jaw 12 carries a lug 12 with which I knob 20 the last, of course, beinglocated upon the spindle eXteriorly of the casing 1 1.

By manually operating the knob 20 at any time, it will be seen that thewiper-tooth 20 will be caused to cooperate with the lug 11 and thus holdthe jaws in inoperative p0 sition, The face platel l on'casing 14 alsohas journaled transversely thereof a spindle 21, which spindle, too, hasfixedly anchored thereon and located'exteriorly of said casing, anoperating knob 21 This spindle '21 is substantially axially in line withbar-' rel 15 (Figs. '1 and 8), the portion ofsaid spindle 21 beyond thewasher 22 being squared (see Fig. 6) for the keying thereon of a disk 23provided with a plurality of wiper-teeth 23 (see Fig. 6). From Figs.

3 and 4 it will be observed that one or the other of the teeth 23* will,upon at most less than a semi-revolution of knob 21 whatever previousposition it may have occupied, engage with thelug 12 to cause adisengagement of the latch-noses 11 and 12 from the keeper 17. Thisgives to a person on the inside a convenient and rapid means ofunlocking the door without the use of a key of any sort. It will benoted, too, that had the jaws 11 and 12 been held in inoperativeposition as aforesaid, the operation of said knob 21. would not disturbthat condition of the jaws. Furthermore, it is clearthat a rotation ofsaid knob 21 will not bring about a rotation of bar 13, and hence thecylinder will not be at all readjusted from its previous setting. itwill immediately be seen that the embodiment is one of sturdy andreliable construction throughout, and that it accomplishes all itsappointed functions in an eflicient and convenient manner; and more thanthis, that there is provided a latching means (the keeper 17 and thecooperant and peculiarly conformed latch-noses ll -and 12 thatabsolutely cannot be picked from the outside, and a latching means, too,that functions automatic-ally upon the closing of a spring door, andthat will not, from. an examinationof the outside of the-door, betrayits presence and employment when exposed to view. 7

Inasmuch asmany changes could be made in the above construction, andmany apparently widely different embodiments of my invention could bemade without departing from the scope thereof, it is intended that allmatter contained in the above description or shown in the accompanyingdraw ings shall be interpreted as illustrative and not in a limitingsense. It is also to be understood that the language used in thefollowing claims is intended to cover all the generic and specificfeatures of the inventionh'erein described and all statements of thescope of theinvention which, as a matter of language, might be said tofall therebetween.

Iclaim: I V a 1. In a device of the class described, in

combination, a door-jamlo, a swinging door,

.means comprising two pivoted jaws yieldingly supported each of which isadapted to strike the keeper when the door is moved toward closedposition, and-to move into position toward each other beneath the keeperwhen the door is fully closed to lock the door and optional meansmovably engageable with the jaws for separating the jaws to unlock thedoor one of which means is arranged'onthe outside of the jaws and theother of said means is arranged between said jaws.

V 2. In a device of the class described, in combination, a swingingdoor, a door j amb,

a keeper carried by the amb, a latch means carried by the door, saidlatch means including a pair of spring pressed pivoted jaws, arranged invertical relation, said jaws having oppositely beveled latch nosesadapted to engage with the keeper for locking the door when the door isclosed, one of which jaws is provided with a short arm, and the other ofwhich jaws is provided with a bifurcated arm, the faces of whichbifurcation are adapted for engagement with said short arm for openingand closing the jaws and means engageable with one of the arms forseparating said jaws.

3. In a device of the class described, in combination, a swinging door,a door amb, a keeper carried by the jamb, a latch means carried by thedoor and functioning to become engaged with said keeper when the door isclosed, said latch means including a pair of spring pressed pivotedjaws, one of which jaws is provided with a short arm, and the other ofwhich jaws is provided with a bifurcated arm, the faces of whichbifurcation are adapted to cooperate with said short arm for opening andclosing the jaws, a lug on one of the jaws, a wiper engageable with saidlug to separate the jaws, a lug on the other jaw and a wiper engageabletherewith for holding the jaws in inoperative position.

l. In a device of the character described,

in combination, a swinging door, a 'door jamb, a keeper carried by the jamb, a latch means carried by the door and functioning to become engagedwith said keeper when the door is closed, said latch means includingapair of spring pressed pivoted jaws, said jaws having contact with eachother adjacent their pivot and pivoted means engageable with one of thejaws for separating the jaws and pivoted means arranged between the jawscooperating with one of the jaws for moving the jaws upon their pivot tocause the jaws to be separated and locked against movement. 5. In adevice of the class described, in combination, a swinging door, a doorjamb, a keeper carried by the jamb, a latch means carried by the doorand functioning to become engaged with said keeper when the door isclosed, said latch means including a pair of spring pressed pivoted jawsarranged for interlocking engagement with each other, a wiper engageablewith one of the jaws operable from one side of the door for unlockingthe jaws from the keeper and a wiper operable from the other side of thedoor engageable with the other jaw for holding the jaws in unlockedposition.

In testimony whereof I aflix my signature.

CHARLES EHRMAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. 0.

